Malicious PDF — malware analysis report

Static analysis result for SHA-256 acb5a55c1c53a11a…

MALICIOUS

PDF

45.5 KB Created: 2021-05-14 20:20:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 722dfe0e04a6f176c6d342bc5ceb339e SHA-1: 54eddcc4d045c1599e13a05dadcb8a3e058f2570 SHA-256: acb5a55c1c53a11aafc6ea2cef09410a710c482d263c6b51ae8aae225f654d9b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising 'game hacks' and 'robux generators'. The primary redirector URL is https://netcdn.xyz/app/431946152/oprewards-com-login-game-hack. This indicates a phishing or scam attempt designed to lure users to potentially harmful websites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/431946152/oprewards-com-login-game-hack In PDF document text
    • https://www.citrus-shop.cz/images/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.citrus-shop.cz/images/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • https://www.citrus-shop.cz/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://www.citrus-shop.cz/images/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://www.citrus-shop.cz/images/coin-master-free-400-spin-link_GM406889139.pdfIn PDF document text
    • https://www.citrus-shop.cz/images/coin-master-free-spin-app-apk_GM406889139.pdfIn PDF document text
    • https://www.citrus-shop.cz/images/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.citrus-shop.cz/images/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • https://www.citrus-shop.cz/images/robux-scam_GM431946152.pdfIn PDF document text
    • https://www.citrus-shop.cz/images/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.citrus-shop.cz/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://www.citrus-shop.cz/images/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • https://www.citrus-shop.cz/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://www.citrus-shop.cz/images/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • https://www.citrus-shop.cz/images/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.citrus-shop.cz/images/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.citrus-shop.cz/images/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • https://www.citrus-shop.cz/images/app-master_GM406889139.pdfIn PDF document text
    • https://www.citrus-shop.cz/images/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.citrus-shop.cz/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004836.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4836 30488 bytes
SHA-256: 207742dc121273a284d03ee17aa86fb8ecd9c5ba6285123f6192b5b38c2c98fb
font_01_sfnt_off00008e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E46 18752 bytes
SHA-256: c42b4bb1fbee134c465cf242b0910ab071fad09d05a92a897e82c1c678a63515

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